absorbed
absorption
artery
blood
bowel
cell
circular
contraction
crypt
difference
digestion
digestive
divided
duodenum
enzyme
epithelium
food
gallblader
gland
ileum
intestine
jejunum
juices
large
liver
lumen
lymph
microvilli
mucosa
mucosal
muscle
muscular
nerve
organ
pancreas
pipe
process
segmants
serosa
small
stomach
structure
surface
tract
tube
tunica
vein
villi
villus